You can raise the stock bars by a bit, I don't remember how much, and they still have enough space to clamp onto the forks. Maybe an inch? It does make a difference. These caps then fill the space left at the top of the fork.
http://www.cbr1100xx.org/forums/index.php?showtopic=46708
They look like the ones in this photo, but without the spacers, and silver tops not black:
http://www.rlmotorcycles.com/GenMar-H112-75-handle-bar-risers-p/gm%20h112.htm
I don't want any cash for them, just want them to go to someone who will actually use them. Joe has first right of refusal, though I think it's not what he's really looking for.